Date
July 23, 2025, 2:10 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 16.813291] ================================================================== [ 16.813365] BUG: KASAN: slab-use-after-free in kmem_cache_double_destroy+0x174/0x300 [ 16.813440] Read of size 1 at addr fff00000c3f17640 by task kunit_try_catch/215 [ 16.813494] [ 16.813535] CPU: 1 UID: 0 PID: 215 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc7 #1 PREEMPT [ 16.813623] Tainted: [B]=BAD_PAGE, [N]=TEST [ 16.813651] Hardware name: linux,dummy-virt (DT) [ 16.813687] Call trace: [ 16.813711] show_stack+0x20/0x38 (C) [ 16.813765] dump_stack_lvl+0x8c/0xd0 [ 16.813815] print_report+0x118/0x5d0 [ 16.813875] kasan_report+0xdc/0x128 [ 16.813922] __kasan_check_byte+0x54/0x70 [ 16.813968] kmem_cache_destroy+0x34/0x218 [ 16.814015] kmem_cache_double_destroy+0x174/0x300 [ 16.814065] kunit_try_run_case+0x170/0x3f0 [ 16.814114] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.814168] kthread+0x328/0x630 [ 16.814212] ret_from_fork+0x10/0x20 [ 16.814261] [ 16.814280] Allocated by task 215: [ 16.814310] kasan_save_stack+0x3c/0x68 [ 16.814352] kasan_save_track+0x20/0x40 [ 16.814391] kasan_save_alloc_info+0x40/0x58 [ 16.814432] __kasan_slab_alloc+0xa8/0xb0 [ 16.814478] kmem_cache_alloc_noprof+0x10c/0x398 [ 16.814520] __kmem_cache_create_args+0x178/0x280 [ 16.814575] kmem_cache_double_destroy+0xc0/0x300 [ 16.814618] kunit_try_run_case+0x170/0x3f0 [ 16.814656] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.814701] kthread+0x328/0x630 [ 16.814733] ret_from_fork+0x10/0x20 [ 16.814771] [ 16.814789] Freed by task 215: [ 16.814815] kasan_save_stack+0x3c/0x68 [ 16.814863] kasan_save_track+0x20/0x40 [ 16.814900] kasan_save_free_info+0x4c/0x78 [ 16.814941] __kasan_slab_free+0x6c/0x98 [ 16.814979] kmem_cache_free+0x260/0x468 [ 16.815017] slab_kmem_cache_release+0x38/0x50 [ 16.815057] kmem_cache_release+0x1c/0x30 [ 16.815093] kobject_put+0x17c/0x420 [ 16.815131] sysfs_slab_release+0x1c/0x30 [ 16.815168] kmem_cache_destroy+0x118/0x218 [ 16.815206] kmem_cache_double_destroy+0x128/0x300 [ 16.815248] kunit_try_run_case+0x170/0x3f0 [ 16.815286] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.815333] kthread+0x328/0x630 [ 16.815366] ret_from_fork+0x10/0x20 [ 16.815403] [ 16.815422] The buggy address belongs to the object at fff00000c3f17640 [ 16.815422] which belongs to the cache kmem_cache of size 208 [ 16.815486] The buggy address is located 0 bytes inside of [ 16.815486] freed 208-byte region [fff00000c3f17640, fff00000c3f17710) [ 16.815555] [ 16.815577] The buggy address belongs to the physical page: [ 16.815612] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103f17 [ 16.815675] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 16.815727] page_type: f5(slab) [ 16.815773] raw: 0bfffe0000000000 fff00000c0001000 dead000000000122 0000000000000000 [ 16.815827] raw: 0000000000000000 00000000800c000c 00000000f5000000 0000000000000000 [ 16.815881] page dumped because: kasan: bad access detected [ 16.815914] [ 16.815934] Memory state around the buggy address: [ 16.815969] fff00000c3f17500: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 16.816014] fff00000c3f17580: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 16.816059] >fff00000c3f17600: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 16.816099] ^ [ 16.816135] fff00000c3f17680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 16.816179] fff00000c3f17700: fb fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.816218] ==================================================================
[ 13.449427] ================================================================== [ 13.449868] BUG: KASAN: slab-use-after-free in kmem_cache_double_destroy+0x1bf/0x380 [ 13.450152] Read of size 1 at addr ffff8881025d4280 by task kunit_try_catch/232 [ 13.450591] [ 13.451027] CPU: 1 UID: 0 PID: 232 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc7 #1 PREEMPT(voluntary) [ 13.451078] Tainted: [B]=BAD_PAGE, [N]=TEST [ 13.451091] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 13.451114] Call Trace: [ 13.451127] <TASK> [ 13.451146] dump_stack_lvl+0x73/0xb0 [ 13.451179] print_report+0xd1/0x610 [ 13.451201] ? __virt_addr_valid+0x1db/0x2d0 [ 13.451276] ? kmem_cache_double_destroy+0x1bf/0x380 [ 13.451300] ? kasan_complete_mode_report_info+0x64/0x200 [ 13.451335] ? kmem_cache_double_destroy+0x1bf/0x380 [ 13.451359] kasan_report+0x141/0x180 [ 13.451381] ? kmem_cache_double_destroy+0x1bf/0x380 [ 13.451408] ? kmem_cache_double_destroy+0x1bf/0x380 [ 13.451432] __kasan_check_byte+0x3d/0x50 [ 13.451452] kmem_cache_destroy+0x25/0x1d0 [ 13.451476] kmem_cache_double_destroy+0x1bf/0x380 [ 13.451499] ? __pfx_kmem_cache_double_destroy+0x10/0x10 [ 13.451523] ? finish_task_switch.isra.0+0x153/0x700 [ 13.451545] ? __switch_to+0x47/0xf50 [ 13.451574] ? __pfx_read_tsc+0x10/0x10 [ 13.451594] ? ktime_get_ts64+0x86/0x230 [ 13.451619] kunit_try_run_case+0x1a5/0x480 [ 13.451644] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.451666] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 13.451691] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 13.451713] ? __kthread_parkme+0x82/0x180 [ 13.451734] ? preempt_count_sub+0x50/0x80 [ 13.451757] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.451780] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.451804] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 13.451837] kthread+0x337/0x6f0 [ 13.451856] ? trace_preempt_on+0x20/0xc0 [ 13.451880] ? __pfx_kthread+0x10/0x10 [ 13.451901] ? _raw_spin_unlock_irq+0x47/0x80 [ 13.451922] ? calculate_sigpending+0x7b/0xa0 [ 13.451946] ? __pfx_kthread+0x10/0x10 [ 13.451968] ret_from_fork+0x116/0x1d0 [ 13.451986] ? __pfx_kthread+0x10/0x10 [ 13.452007] ret_from_fork_asm+0x1a/0x30 [ 13.452037] </TASK> [ 13.452048] [ 13.463660] Allocated by task 232: [ 13.464033] kasan_save_stack+0x45/0x70 [ 13.464473] kasan_save_track+0x18/0x40 [ 13.464682] kasan_save_alloc_info+0x3b/0x50 [ 13.465018] __kasan_slab_alloc+0x91/0xa0 [ 13.465468] kmem_cache_alloc_noprof+0x123/0x3f0 [ 13.465901] __kmem_cache_create_args+0x169/0x240 [ 13.466488] kmem_cache_double_destroy+0xd5/0x380 [ 13.466739] kunit_try_run_case+0x1a5/0x480 [ 13.467077] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.467511] kthread+0x337/0x6f0 [ 13.467848] ret_from_fork+0x116/0x1d0 [ 13.468211] ret_from_fork_asm+0x1a/0x30 [ 13.468702] [ 13.468975] Freed by task 232: [ 13.469420] kasan_save_stack+0x45/0x70 [ 13.469738] kasan_save_track+0x18/0x40 [ 13.469938] kasan_save_free_info+0x3f/0x60 [ 13.470386] __kasan_slab_free+0x56/0x70 [ 13.470696] kmem_cache_free+0x249/0x420 [ 13.471000] slab_kmem_cache_release+0x2e/0x40 [ 13.471397] kmem_cache_release+0x16/0x20 [ 13.471723] kobject_put+0x181/0x450 [ 13.472054] sysfs_slab_release+0x16/0x20 [ 13.472409] kmem_cache_destroy+0xf0/0x1d0 [ 13.472900] kmem_cache_double_destroy+0x14e/0x380 [ 13.473421] kunit_try_run_case+0x1a5/0x480 [ 13.473605] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.473869] kthread+0x337/0x6f0 [ 13.474021] ret_from_fork+0x116/0x1d0 [ 13.474207] ret_from_fork_asm+0x1a/0x30 [ 13.474389] [ 13.474473] The buggy address belongs to the object at ffff8881025d4280 [ 13.474473] which belongs to the cache kmem_cache of size 208 [ 13.475527] The buggy address is located 0 bytes inside of [ 13.475527] freed 208-byte region [ffff8881025d4280, ffff8881025d4350) [ 13.476412] [ 13.476500] The buggy address belongs to the physical page: [ 13.477041] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1025d4 [ 13.477552] flags: 0x200000000000000(node=0|zone=2) [ 13.477784] page_type: f5(slab) [ 13.477949] raw: 0200000000000000 ffff888100041000 dead000000000122 0000000000000000 [ 13.478638] raw: 0000000000000000 00000000800c000c 00000000f5000000 0000000000000000 [ 13.479402] page dumped because: kasan: bad access detected [ 13.479603] [ 13.479678] Memory state around the buggy address: [ 13.479851] ffff8881025d4180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.480086] ffff8881025d4200: fb fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.480305] >ffff8881025d4280: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.480518] ^ [ 13.480636] ffff8881025d4300: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 13.480899] ffff8881025d4380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.481225] ==================================================================